美国元首的产生方式

what are the rules?Write two rules for each situation using expressions from the box.（就给了以下词：can't ,(not )be allowed to,mustn't,no()ing allowed)1.In a hospital2.during an exam3.At s concert4.At a beach每个要求写两个rules!55555 Listen to the tape then answer the question below.请问below在这算是什么成分啊?作副词还是介词?为什么要放在最后呢? 谁给我几首自己编的童谣啊! 谁能帮我编一首童谣,积极向上的 when have they finished the work 时态哪里不对 They have already finished their homework（改为否定句） 1.副词能作介词的宾语吗?如from today对吗 2.有没有介词短语作介词的宾语的情况,请举些例子. return from abroad.中abroad是什么成分?是做副词吗?介词后面可以跟副词吗? From there?介词可以接副词?为什么可以这样用? across和cross的区别介词必须跟介词宾语在一起才能存在于句子中,比如,这个句子帮我改一下我就明白了He walked across the bridgeacross the bridge 是介词短语,但是如果改为cross的话句子应该怎么改. 七年级英语across from和cross from区别是什么 请问cross与across的区别 across和cross的区别是什么? cross和across的区别!我知道across为介词,而cross为动词,但是有一个问题：cross是不是等于：动词+across “go cross"对不对,不是说两个动词不能放在一起的么?到底是go across,还是go cross?我和是个学生, they have finished the work改写意思相近的句子 get off(on)的中文意思是什么 get on/off it 还是 get it on/off----------------------[-急-] 上（下）车是get on（off）it还是get it on（off）? 高虹简介,快有个孩子叫咪咪乔 谁知道的作者高虹?最好有简介,不要太长,但要说清楚.谢谢! 有个孩子叫咪咪乔 you can have enough time to do it(同义句)you can have ____ ____ time to do it 高虹的作文有个孩子叫咪咪乔谁知到 续写《有个孩子叫咪咪乔》400字 Do you know why different animals or pests(昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.　　Some birds like eating locusts(蝗虫), but birds cannot easily catch them. Why? It is because locusts cha there are more than twenty trees in our school.这里面哪个词是定语?i have a lot of things to do.这定语又是哪个? Do you know why different animals or pets have their special colours?... get on的反义词31587317 81140767 get off的反义词是什么 get off反义词 on的反义词是____ (A) off (B) under 并说明理由 come to the end 和came to an end 的区别还有个字适用的情况.题目写错了应该是 come to the end 和come to an end 的区别